已知直线l经过点
,求直线l的斜率分别为何值时,满足下列条件:
(1)直线l经过圆
的圆心;
(2)直线l与圆
相切;
(3)直线l与圆
相交,且截得的弦长为2.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade8b4360a4a83772622964adba8205c.png)
(1)直线l经过圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e28309347c4172fbb699d9bbe79be2.png)
(2)直线l与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c53b4e2000a3933f780610920ee05c75.png)
(3)直线l与圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01bc5db23b88edf823e74a68af8fcf8.png)
21-22高二·全国·课后作业 查看更多[3]
更新时间:2022-03-05 10:17:42
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【推荐1】
中,
,直线
是
的平分线所在的直线,直线
是
边上的高所在的直线.
(1)求点
的坐标;
(2)求直线
的方程.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】已知三角形的三个顶点
,
,
.
(1)求
边的中垂线所在直线的方程;
(2)求△ABC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d71fb4d3db6c9922d3b605a6d40e529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcfce809e35760212e25a2acb43e62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5558ffa6dc28d437c0467c7f361d444.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求△ABC的面积.
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解答题-证明题
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【推荐2】已知圆
:
.
(1)求圆
的圆心坐标及半径;
(2)设直线
:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b6e4a25a8896f90bc3c249954bd3d4.png)
①求证:直线
与圆
恒相交;
②若直线
与圆
交于
,
两点,弦
的中点为
,求点
的轨迹方程,并说明它是什么曲线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f46bd6985253f993dc2d1c12b801dc2.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b6e4a25a8896f90bc3c249954bd3d4.png)
①求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】在平面直角坐标系
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(I)求圆
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(II)若椭圆
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
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【推荐2】在平面直角坐标系xOy中,已知直线L:x+y-1=0和圆C:
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【推荐1】已知圆
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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(1)求圆
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(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】已知圆C:
,直线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f014eaf826be5ced359abd6613ec65.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ba578f6d037b8e3bcb3a4c566b52db3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当t =1时,由直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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